Protecting device for vapor apparatus.



No. 845,722. PATENTBD FEB. 26, 1907.

1 P. H. THOMAS. A

PROTECTING DEVIGE FOR VAPOR APPARATUS.

APPLICATION FILED JULY 30, 1904.

54400.1 l'oz $33. Mafl'omwu A. s

' the current must pass through a short vapor-. s ace, utilizing a-portion of the liqmd as one heating may cause a breaking of the material I prevent injurious e and for this purpose I provide a cap-piece of place when'the tilting of the larfip UNITE STATES PATENT oE IoE.

PERCY H. THOMAS; or men? ORANGE, NEW JERSEY, ASSIGNOR TO COOPER HEWITT ELECTRIC COMPANY, on NEW YORK, Y., A CORPORATION or NEW YORK.

norzcrme' DEVICE FOR VAPOR APPARATUS.

Specificationof LettersPatent.

Patented Feb. 26, 1907.

7 Substitute ofhpplication Serial No. 217.764, filed July 234.905 This application filed J 1113 30,1904. Serial No. 218,832.

To all whom it may concern:

Be it known that I, PEROY H. THOMAS, a citizen'of the United States, and a resident of East Orange, county of Essex,- State of New Jersey, have invented certain new and useful one or more pockets. leading oil from the main body of the container it is found that sudden movements of. the container may cause a momentary separation between the liquid in the electrode+pockets and the leading-in wires. Sucha separation may take for startmg purposes :is undertaken. happens to be operating or. the current turned on, this means that iorthe moment .e ectrode and thelead-wire as the other. in case the lead-wire is caused to actas a positive electrode" by reason of the fact thatit usually has every small area or cross-section it may-become excessively-heated even in the veryshort space of time during which the liquid is separated from the lead-wire. This of the container or the liberation of a certain amount of deleterious gases or injury to the lead-Wire itself. a in some linstances the gen eration of a small quantit of gas under such circumstances as those dzscribed causes an elevation'of temperature in the liquid which prevents the separated particles of the liquid from; again returning to the electrode in the p The object of the resent invention is to iigcts of this character,

insulating material, preferably fastened to the end of the lead-wire, which cap-piece, to-

gether with the end, of the lead-wire itself in some instances, provides a pocket for holding .back the liquid at a time when the lead-wire would otherwise be left bare and which thereby prevents the current from having access to the uncovered surface of the lead-wire. This is the arrangement which I prefer for protecting the positive lead-wire. he nega- .to both the the lamp tive lead-wire may be protectedby so forming the lass around the oint where the wire leaves t e glass as to ma retaining a portion of the liquidin contact with the lead-wire, the liquid being the art 'which preferably takes the current. 'T ese different provisions for the positive lead-wire and the ne ative lead-wire rest upon the assumption t at the negative lead-Wire is not likely to be subjected to so great danger of exposure as the positive lead-wire under ordinary conditionsjof lamp operation.

The drawin represents a mercury-vapor lamp having tile present invention applied trode.

other suitable transparent material.

I 2 is a positive electrode, of mercury, and 3. 1s a negative electrode, of the same material.

The respective electrodes are provided with leadewires 4 and 5, passing through the pockets or extensions 6 and ,7, in winch the el ctrode materialfis contained. The leadwire 4 for the positive electrode is spread at its ihner end and provided with a cap 8, of glass or other insulating material, secured to the endof the lead-wire. The glass at the point where the lead-wire 4 passes through is s read and formed into a sort of cup-shape t e'end of the wire passing into the cup an constituting with the cap-piece 8 a retainin means for preventin the sudden withdrawa of the mercury in the cup in case of shock The lead-Wire 5 is not provided with any cap;

but it is found sufficient to let it pass mto a asmall ocket for A positive and the negative elecrelation to the wal soft the pocket 7 so as to prevent a sudden emptying of the pocket in case of tilting or shock.

I claim as my invention 1. in a vapor electric apparatus the combination with a lead-wire, a liquid electrode around the same an outer pocket for holding the said electrode, and a cup-shaped receptacle'immediately surrounding the lead-wire for holding a portion of'the liquid in contact therewith at times of sudden jar.

, 2. Ina vapor electric apparatus, a main chamber, an electrode of conducting liquid, an outer receptacle for holding the said electrode, and a lead-wire entering the said receptacle, in combination with a cup-shaped re- 'ceptacle immediately surrounding the inner end of the lead-Wire and adapted to prevent the separation of the electrode material from the lead-Wire on the occurrence of a sudden j'ar.

3. In a vapor electric apparatus, a main chamber, an'electrode of conducting liquid, a receptacle for holding the said electrode, and

a lead-wire entering thesaid receptacle, in

combination with a pocket surrounding the inner end of the lead-Wire, and an insulatingcap supported upon the extremity of the lea w1re. M

:4, In a {vapor electric apparatus, a main chamber, an electrode of conducting liquid, a receptacle for holding the said electrode, a lead-wire entering the said receptacle, and means for causing a portionrof the conducting liquid material to remain in contact with the lead-Wire when theapparatus is jarred.

Signed at New York, in the county of New York and State of New York, this 26th day of July, A. D. 1904. p v

. PERCY H. THOMAS. Witnesses:

WM. H. OAPEL,

GEORGE H. STooKBRInGEQ 

